name: CI Pipeline

# 📌 1. 어떤 이벤트에서 실행할지 설정
on:
  push:
    branches:
      - 'main'       # 운영 브랜치
      - 'dev'        # 통합 테스트 브랜치
      - 'feature/**' # 기능 개발 브랜치
      - 'hotfix/**'  # 긴급 수정 브랜치
  pull_request:
    branches:
      - 'main'
      - 'dev'

# 📌 2. 공통 환경 변수
env:
  NODE_VERSION: '18'
  GCS_BUCKET: ${{ secrets.GCS_BUCKET_NAME }}     # GCS 버킷 이름 (Secrets에 저장 필요)
  GCP_SA_KEY: ${{ secrets.GCP_SA_KEY }}          # GCP 서비스 계정 키 (JSON)
  COMMIT_HASH: ${{ github.sha }}                 # 현재 커밋 해시 (배포 시 버전 추적용)

jobs:
  ci:
    runs-on: ubuntu-latest  # GitHub에서 제공하는 리눅스 환경 사용

    steps:
      # 📦 코드 체크아웃
      - name: 📦 Checkout code
        uses: actions/checkout@v3

      # ⚙️ Node.js 설치
      - name: ⚙️ Setup Node.js
        uses: actions/setup-node@v3
        with:
          node-version: ${{ env.NODE_VERSION }}

      # 📥 Node 패키지 설치
      - name: 📥 Install dependencies
        run: npm ci

      # ✅ [feature 브랜치 전용] Lint만 수행
      - name: 🧹 Lint (feature only)
        if: startsWith(github.ref, 'refs/heads/feature/')
        run: npm run lint

      # ⏩ feature 브랜치에서는 빌드/테스트 생략
      - name: ⏩ Skip build/test (feature only)
        if: startsWith(github.ref, 'refs/heads/feature/')
        run: echo "Skip build/test for feature/*"

      # ✅ [main/dev/hotfix] 공통 빌드 및 테스트

      # 🛠 프로젝트 빌드
      - name: 🛠 Build project
        if: "!startsWith(github.ref, 'refs/heads/feature/')"
        run: npm run build

      # 🧪 백엔드 테스트
      - name: 🧪 Run Backend tests
        if: "!startsWith(github.ref, 'refs/heads/feature/')"
        run: npm run test:backend

      # 🧪 프론트엔드 테스트
      - name: 🧪 Run Frontend tests
        if: "!startsWith(github.ref, 'refs/heads/feature/')"
        run: npm run test:frontend

      # 🧪 AI 서버 테스트 (Python)
      - name: 🧪 Run AI tests
        if: "!startsWith(github.ref, 'refs/heads/feature/')"
        run: |
          cd ai
          python -m venv venv
          source venv/bin/activate
          pip install -r requirements.txt
          pytest

      # 🧹 린트 실행 (공통)
      - name: 🧹 Lint
        if: "!startsWith(github.ref, 'refs/heads/feature/')"
        run: npm run lint

      # ☁️ 배포 단계 (main 브랜치 한정)

      - name: 📦 Package backend
        if: github.ref == 'refs/heads/main'
        run: zip -r app-${COMMIT_HASH:7}.zip dist/

      - name: ☁️ Upload backend to GCS
        if: github.ref == 'refs/heads/main'
        uses: google-github-actions/upload-cloud-storage@v1
        with:
          path: app-${COMMIT_HASH:7}.zip
          destination: ${{ env.GCS_BUCKET }}/backend/
          credentials: ${{ env.GCP_SA_KEY }}

      - name: 📦 Package frontend
        if: github.ref == 'refs/heads/main'
        run: |
          mkdir -p packaged/frontend-${COMMIT_HASH:7}
          cp -r dist/* packaged/frontend-${COMMIT_HASH:7}/

      - name: ☁️ Upload frontend to GCS
        if: github.ref == 'refs/heads/main'
        uses: google-github-actions/upload-cloud-storage@v1
        with:
          path: packaged/frontend-${COMMIT_HASH:7}
          destination: ${{ env.GCS_BUCKET }}/frontend/${{ env.COMMIT_HASH }}
          credentials: ${{ env.GCP_SA_KEY }}

      - name: 📦 Package AI
        if: github.ref == 'refs/heads/main'
        run: zip -r ai-${COMMIT_HASH:7}.zip ai/ venv/ requirements.txt main.py

      - name: ☁️ Upload AI to GCS
        if: github.ref == 'refs/heads/main'
        uses: google-github-actions/upload-cloud-storage@v1
        with:
          path: ai-${COMMIT_HASH:7}.zip
          destination: ${{ env.GCS_BUCKET }}/ai/
          credentials: ${{ env.GCP_SA_KEY }}